feat(data): integrate 9 UK government data sources via Kestra

Adds a full data integration pipeline for enriching school profiles with
supplementary data from Ofsted, GIAS, EES, IDACI, and FBIT.

Backend:
- Bump SCHEMA_VERSION to 3; add 8 new DB tables (ofsted_inspections,
  ofsted_parent_view, school_census, admissions, sen_detail, phonics,
  school_deprivation, school_finance) plus GIAS columns on schools
- Expose all supplementary data via GET /api/schools/{urn}
- Enrich school list responses with ofsted_grade + ofsted_date

Integrator (new service):
- FastAPI HTTP microservice; Kestra calls POST /run/{source}
- 9 source modules: ofsted, gias, parent_view, census, admissions,
  sen_detail, phonics, idaci, finance
- 9 Kestra flow YAMLs with scheduled triggers and 3× retry

Frontend:
- SchoolRow: colour-coded Ofsted badge (Outstanding/Good/RI/Inadequate)
- SchoolDetailView: 7 new sections — Ofsted sub-judgements, Parent View
  survey bars, Admissions, Pupils & Inclusion / SEN, Phonics, Deprivation
  Context, Finances
- types.ts: 8 new interfaces + extended School/SchoolDetailsResponse

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

docker-compose.yml

@@ -77,9 +77,70 @@ services:
       retries: 3
       start_period: 40s
 
+  # Kestra — workflow orchestrator (UI at http://localhost:8080)
+  kestra:
+    image: kestra/kestra:latest
+    container_name: schoolcompare_kestra
+    ports:
+      - "8080:8080"
+    volumes:
+      - kestra_storage:/app/storage
+      - ./integrator/flows:/flows
+    environment:
+      KESTRA_CONFIGURATION: |
+        datasources:
+          postgres:
+            url: jdbc:postgresql://db:5432/kestra
+            driverClassName: org.postgresql.Driver
+            username: schoolcompare
+            password: schoolcompare
+        kestra:
+          repository:
+            type: postgres
+          queue:
+            type: postgres
+          storage:
+            type: local
+            local:
+              base-path: /app/storage
+    depends_on:
+      db:
+        condition: service_healthy
+    networks:
+      - schoolcompare-network
+    restart: unless-stopped
+
+  # Data integrator — Python microservice called by Kestra
+  integrator:
+    build:
+      context: ./integrator
+      dockerfile: Dockerfile
+    container_name: schoolcompare_integrator
+    ports:
+      - "8001:8001"
+    environment:
+      DATABASE_URL: postgresql://schoolcompare:schoolcompare@db:5432/schoolcompare
+      DATA_DIR: /data
+      PYTHONUNBUFFERED: 1
+    volumes:
+      - ./data:/data
+    depends_on:
+      db:
+        condition: service_healthy
+    networks:
+      - schoolcompare-network
+    restart: unless-stopped
+    healthcheck:
+      test: ["CMD", "curl", "-f", "http://localhost:8001/health"]
+      interval: 30s
+      timeout: 10s
+      retries: 3
+      start_period: 15s
+
 networks:
   schoolcompare-network:
     driver: bridge
 
 volumes:
   postgres_data:
+  kestra_storage: